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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> *   http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a>
<span class="sourceLineNo">016</span> *<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>package examples;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.lang.reflect.Method;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.security.CodeSource;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Enumeration;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.HashMap;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.Map;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.jar.JarEntry;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.jar.JarFile;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>public class Main {<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>    /**<a name="line.31"></a>
<span class="sourceLineNo">032</span>     * Helper application for example classes.<a name="line.32"></a>
<span class="sourceLineNo">033</span>     * Lists available classes, and provides shorthand invocation.<a name="line.33"></a>
<span class="sourceLineNo">034</span>     * For example:&lt;br/&gt;<a name="line.34"></a>
<span class="sourceLineNo">035</span>     * &lt;code&gt;java -jar commons-net-examples-m.n.jar FTPClientExample -l host user password&lt;/code&gt;<a name="line.35"></a>
<span class="sourceLineNo">036</span>     *<a name="line.36"></a>
<span class="sourceLineNo">037</span>     * @param args the first argument is used to name the class; remaining arguments<a name="line.37"></a>
<span class="sourceLineNo">038</span>     * are passed to the target class.<a name="line.38"></a>
<span class="sourceLineNo">039</span>     * @throws Exception<a name="line.39"></a>
<span class="sourceLineNo">040</span>     * @throws Exception<a name="line.40"></a>
<span class="sourceLineNo">041</span>     */<a name="line.41"></a>
<span class="sourceLineNo">042</span>    public static void main(String[] args) throws Exception  {<a name="line.42"></a>
<span class="sourceLineNo">043</span>        if (args.length==0) {<a name="line.43"></a>
<span class="sourceLineNo">044</span>            System.out.println("Usage: java -jar examples.jar &lt;exampleClass&gt; &lt;exampleClass parameters&gt;");<a name="line.44"></a>
<span class="sourceLineNo">045</span>        }<a name="line.45"></a>
<span class="sourceLineNo">046</span>        CodeSource codeSource = Main.class.getProtectionDomain().getCodeSource();<a name="line.46"></a>
<span class="sourceLineNo">047</span>        Map&lt;String, String&gt; map = new HashMap&lt;String, String&gt;();<a name="line.47"></a>
<span class="sourceLineNo">048</span>        if ( codeSource != null) {<a name="line.48"></a>
<span class="sourceLineNo">049</span>            final String sourceFile = codeSource.getLocation().getFile();<a name="line.49"></a>
<span class="sourceLineNo">050</span>            if (sourceFile.endsWith(".jar")) {<a name="line.50"></a>
<span class="sourceLineNo">051</span>                if (args.length==0) {<a name="line.51"></a>
<span class="sourceLineNo">052</span>                    System.out.println("\nClasses found in the jar:");<a name="line.52"></a>
<span class="sourceLineNo">053</span>                }<a name="line.53"></a>
<span class="sourceLineNo">054</span>                JarFile jf = new JarFile(sourceFile);<a name="line.54"></a>
<span class="sourceLineNo">055</span>                Enumeration&lt;JarEntry&gt; e = jf.entries();<a name="line.55"></a>
<span class="sourceLineNo">056</span>                while (e.hasMoreElements()) {<a name="line.56"></a>
<span class="sourceLineNo">057</span>                  JarEntry je = e.nextElement();<a name="line.57"></a>
<span class="sourceLineNo">058</span>                  String name = je.getName();<a name="line.58"></a>
<span class="sourceLineNo">059</span>                  if (!name.endsWith(".class")<a name="line.59"></a>
<span class="sourceLineNo">060</span>                          || name.contains("$") // subclasses<a name="line.60"></a>
<span class="sourceLineNo">061</span>                          || name.equals("examples/nntp/NNTPUtils.class") // no main class<a name="line.61"></a>
<span class="sourceLineNo">062</span>                          || name.equals("examples/util/IOUtil.class") // no main class<a name="line.62"></a>
<span class="sourceLineNo">063</span>                          || name.equals("examples/Main.class")) {<a name="line.63"></a>
<span class="sourceLineNo">064</span>                      continue;<a name="line.64"></a>
<span class="sourceLineNo">065</span>                  }<a name="line.65"></a>
<span class="sourceLineNo">066</span>                  name = name.replace(".class", "");<a name="line.66"></a>
<span class="sourceLineNo">067</span>                  int lastSep = name.lastIndexOf('/');<a name="line.67"></a>
<span class="sourceLineNo">068</span>                  String alias = name.substring(lastSep+1);<a name="line.68"></a>
<span class="sourceLineNo">069</span>                  if (args.length==0) {<a name="line.69"></a>
<span class="sourceLineNo">070</span>                      System.out.printf("%-25s %s%n",alias,name);<a name="line.70"></a>
<span class="sourceLineNo">071</span>                  }<a name="line.71"></a>
<span class="sourceLineNo">072</span>                  map.put(alias, name);<a name="line.72"></a>
<span class="sourceLineNo">073</span>                }<a name="line.73"></a>
<span class="sourceLineNo">074</span>                jf.close();<a name="line.74"></a>
<span class="sourceLineNo">075</span>            }<a name="line.75"></a>
<span class="sourceLineNo">076</span>        }<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span>        if (args.length==0) {<a name="line.78"></a>
<span class="sourceLineNo">079</span>            return;<a name="line.79"></a>
<span class="sourceLineNo">080</span>        }<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>        String shortName = args[0];<a name="line.82"></a>
<span class="sourceLineNo">083</span>        String fullName = map.get(shortName);<a name="line.83"></a>
<span class="sourceLineNo">084</span>        if (fullName == null) {<a name="line.84"></a>
<span class="sourceLineNo">085</span>            fullName = shortName;<a name="line.85"></a>
<span class="sourceLineNo">086</span>        }<a name="line.86"></a>
<span class="sourceLineNo">087</span>        fullName = fullName.replace('/', '.');<a name="line.87"></a>
<span class="sourceLineNo">088</span>        Class&lt;?&gt; clazz = Class.forName(fullName);<a name="line.88"></a>
<span class="sourceLineNo">089</span>        Method m = clazz.getDeclaredMethod("main", new Class[]{args.getClass()});<a name="line.89"></a>
<span class="sourceLineNo">090</span>        String[] args2 = new String[args.length-1];<a name="line.90"></a>
<span class="sourceLineNo">091</span>        System.arraycopy(args, 1, args2, 0, args2.length);<a name="line.91"></a>
<span class="sourceLineNo">092</span>        m.invoke(null, (Object)args2);<a name="line.92"></a>
<span class="sourceLineNo">093</span>    }<a name="line.93"></a>
<span class="sourceLineNo">094</span>}<a name="line.94"></a>




























































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